MountainPeaks.net - Web site that displays image of mountain peaks as seen from any location and elevation. Peak names, elevation and lat/lon are also provided. Site currently has over 75000 named peaks in north america.

Natural Born Hikers - Group of hikers share their knowledge of trails. Includes trip reports, trail descriptions,and photos from hikes all over the United States and abroad.

Roadlessland.org - Roadlessland.org provides interactive maps for all of the roadless
areas in the US along with thousands of photographs from the trail.
You can print topo maps from anywhere in the US, upload your
own photos and comments and get directions. Roadlessland is a
completely non-commercial site.